THNK multiplayer help pls

i was using thnk and following the step in the website exactly but idk why it doesn’t work,

Each client cant see eachother ( I have synchronize the object player)

When i control from the client each can just control every other player but when the main(the main screen(the first one that open out idk the name maybe server)) control one, it only control one on the client screen but on the main screen it control all of them